Typewriting machine



May 6, 1930. G. o. DEGENER TYPEWRITING MACHINE Filed OG. 51, 1928 2Sheets-Sheet l I Summer, G'wiwe egerzef; 5 f'emg, W2k

dtml-nega May 6, 1930. G. o. DEGENER 1,757,516

TYPEWRITING MACHINE Filed Oct. 31, 1928 2 Sheets-Sheet 2 iNvENToRATTORNEYS 4liatentecl May 6, 1930 UNITED STATES PATENT oFFlcE:

GUSTAVE O. DEGENER, BROOKLYN, NEW YORK, ASSIGNOR TO ROYAL TYPEWBITEBCOMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK TYPEWRITING MACHINE Application mea october a1, 192s. serial No. 316,261.

This invention relates to a line spacing mechanism for typewritersgenerally, a1- though particularly the invention is directed to a keycontrolled power mechanism for actuating the line spacing mechanism atany point in the travel of the carriage.

In the drawings:

Figure 1 is a vertical sectional view taken in a plane fore and aft ofthe machine and disclosing such portions of the typewriter only as arenecessary to an understanding of my invention, the view showingparticularly the'key controlled power mechanism and the ratchetmechanism for line spacing the platen.

Figure 2 is a detail front elevation of the line spacing mechanismshowing the power operated arm or lever in section, the parts beingshown Vin their normal or inoperative positions, and

F iglre 3 is a similar view but showing the parts in their operativepositions.

Only so much of a typewriting machine is illustrated in the present caseas is necessary to .disclose the invention and its operation and thelocation of the various elements with respect tothe other parts of themachine.

In my co-pending application Serial-Num ber 316,260, filed Aug. 3l,1928, I disclose a key controlled power operating mechanism foreii'ecting a line spacing movement and also a carriage return movementwhich is operative at any point in the carriage travel, and anindependent key controlled power operated line spacing mechanism whichis adapted for operation at any point in the carriage travel without,however, returning the carriage to its initial-position.

My present invention relates to a' different construction of keycontrolled power operated mechanism for effecting a line spa@ ingoperation in any position of the carriage travel and without returningthe carriage to its initial position. y

Accordingly, there is shown in the accompanying drawings a carriage Ahaving a platen B and associated with the platen is a line spacingmechanism C. The line spacing mechanism C includes, a vertical shaft 1having a rock arm 2 -xed to the upper end thereof, and an operatinglever or rock arm 3 fixed to the lower end thereof. A link 4 ispivotally connected at one end to the rock arm 2', and at its other endto an arm 5 pivoted to the carriage. A spring paWl 6 is pivoted to anarm 4 for cooperation with a ratchet wheel 7 fixed to the adjacent endof the platen B to effect a line spacing movement of the platen uponmovement of the operating lever 3.

A draw band 8 is connected at one end to the operating lever 3 and atits other end to va winding drum 9 fulcrumed on a bearing 10 fixed tothe main frame of the machine. The construction thus far described ispresent in my copending application Serial No. 316,260,

the drum 9 functioning when connected to the power shaft to eiect a linespacing operation of the platen and a subsequent return movement to thecarriage. Rotatable with the drum 9 is a gear 11 having teeth 12. Thedraw band 8 is trained around a roller 13 journaled on an axis 14 fixedto the main frame, the roller being located between the operating arm 3and the drum 9. Disposed above the roller 13 is a bell-crank lever 15which is fulcrumed at its angle as at 16 to the main frame of themachine. This bell-crank hlever 15 includes a substantially horizontalarm 17 and a substantially vertical arm 18. A

-roller 19 is journaled on the upper end of the the downward movementthereof. By reason of the roller 19 being located at the upper end ofthe substantially vertical arm 18 the draw band 8 isvcaused to assume asubstantially right angular relation whereby upon movement of the arm 18to the right as shown in Figure 3, a pull will be exerted on the drawband 8 and thereby actuate the operating arm 3 and effect a line spacingmovement to the platen. 4

Such a pull on the draw band 8, however, can only be effected when thewinding drum 9 is held against rotation. Therefore, to this end I haveprovided means for locking the winding drum 9 against rotation duringthe time the bell-crank lever 15 is being moved to bring about a linespacing operation. For this purpose I have provided a latch 20 which ispivoted as at 21 tothe frame of the machine and a link 22 is pivotallyconnected at one end to the latch 20 and at its other end to theverticalarm 23 of a bell-crank `lever 24: which is fulcrumed at its angleas at25 to the frame of the macl1i-ne.- A coil spring 26 is connected at oneend to the arm 23 and .atits other end to the frame of the machine andfunctions to normally urge the latch 20 into operative engagement' withthe teeth12 of the drum gear 11. The bell-crank lever 24 is providedwith an arm 27 which extends laterally under but in spaced relation tothe arm 17 of the bell-crank lever 15. l v

vAn actuating lever or power arm 28 is fulcrumed as at 29 on the frameof the machine and a key 30 is also fulcruined on the frame of themachine. Carried by the actuating lever or power arm 28 is a star wheel31 which is adapted upon depression of the key 30 to be moved vintooperative engagement with a 'power shaft 32. Upon engagement of the starwheel 31 with the power shaft 32 the actuating lever or power arm 28will be oscillated on-its pivot 29 so as to move the right hand endupwardly as viewed in Figure 3. Normally, the power arm or actuatinglever 28 engagesthe arm 27 ofthe bell-crank lever.

24 and holds the latch 2O out of engagement Vwith the teeth 12 of thedrum gear 11 :and against the tension of the spring 26, as shown inFigure'2. When, however, the key 30 is depressed and the power shaft 32raises the free end of the actuating lever 28, the spring 26 willfunction to swing the latch 20` into locking engagement with the teeth12 of the drum gear 11 and thereby hold said drum againstrotation.During the latter part of the movement of the power arm or actuatinglever 28 the arm 17 of the bell-crank lever 15 will be engaged by saidactuating lever and consequently the arm 18 will be swung towards therightas shown in Figure 3, thereby exerting a pull on the draw band 8and efecting a line spacingA movement while the drum 9 is locked againstrotation. As soonasthis line spacing operation has been effected, the lengaging p oint of the star wheel 31 will have been moved out ofengagement withl the power shaft 32 and consequently the parts will beautomatically returned to their nor- -mal positions as shown in Figure2.

locking the drum against rotation and for exerting a pull on the bandbetween the operating lever and the drum while the drum is locked foractuating said operating lever.

,2. In a line spacing mechanism for type- .wri-tingmachines having aline spacing mechanism and an operating lever therefor, the

combination with said operating lever, of a l l operating lever,`andmeans common to both of said normally ineiecti've means for controllingthe same.

3. In a line spacingmechanism for typewriting machines having a linespacing mechanism and an operating lever therefor, the

`combination with said operating lever, of a winding drum, al draw bandconnecting the operating lever and drum, means for locking the drumagainst rotation, normally ineffective means for exerting a pull on thedraw band for actuating said operating lever,and an actuating levercooperating with the drum locking means to normally retain the latterineffective and adapted upon movement to render the same effective and-to operate the normally ineiiective draw band pull means. 4. In a linespacing mechanism for typewriting machines having a line spacinmechanism and an operating lever there or, the combination with saidoperating lever, 'of a winding drum, a draw band connecting theoperating lever and drum, means for locking the d ruin against rotationincluding a latch adapted to cooperate with the drum, a bell-cranklever, a link connecting the latch and bell-crank' lever, and a springfor urging the latch into engagement with the drum, normally ineectivemeans for exerting a pull `011 the draw band for actuating saidoperating lever, and an actuating lever cooperating with the bell-crankflever to normally retain the latch disengaged from the drum-and adaptedupon movement to render the same eifective and to operate the normallyineffective draw band pull means.

5. In a line spacing mechanism for typewriting machines having a linespacing mechanism and an operating lever therefor, the combination withsaid operating lever, of a winding drum, a draw band connecting theoperating lever and drum, means for locking the drum against rotation,normally ineii'ective means for exerting a pull on the draw band foractuating saidy operating lever including a bell-crank lever, and aroller carried by one arm of the bell-crank lever and engageable withthe draw band between the operating lever and the drum, and an actuatinglever cooperating with the drum locking means to normally retain thelatter ineiiective and adapted upon .movement to render the sameeffective and to operate the bell-crank lever of the draw band pullmeans.

l 6. In a line spacing mechanism for typewriting machines having a linespacin mechanism and an operating lever there or, the

combination with said operating lever, of a winding drum, a draw bandconnecting the operating lever and drum, means for locking the drumagainst rotation including a .latch adapted to vcooperate with the drum,a bellcrank lever, a link connecting the latch and bell-crank lever, anda spring for urging the latch into engagement with the drum, normallyineective means for exerting a pull on the draw band for actuating saidoperating lever including a bell-crank lever, a roller carried by onearm of the bell-crank lever and engageable with the draw band betweenthe operating lever and the drum, and an actuating lever cooperatingwith the bellcrank lever of the drum locking means to normally retainthe latch disengaged from the drum and adapted upon movement to renderthe same eiective and to operate the bellcrank lever of the draw bandpull means.

7 In a line spacing mechanism for typewriting machines having a linespacin mechanism and an operating lever there or, the combination withsaid operating lever, of a winding drum, a draw band connecting theoperating lever and drum, and a key controlled power mechanism forlocking the drum against rotation and for exerting a pull on the bandbetween the operating lever Iand the drum while the drum is locked foractuating said operating lever.

f In testimony whereof, I have hereunto subscribed my name.

GUSTAVE O. DEGENER.

